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Today's Topics:
1. RE: Logging DHCP lease duration in seconds (Glenn Satchell)
2. Re: Logging DHCP lease duration in seconds (Alp Eren Kose)
----------------------------------------------------------------------
Message: 1
Date: Sun, 4 Oct 2015 23:47:00 +1100
From: "Glenn Satchell" <[email protected]>
To: "Users of ISC DHCP" <[email protected]>
Subject: RE: Logging DHCP lease duration in seconds
Message-ID:
<[email protected]>
Content-Type: text/plain;charset=iso-8859-1
Hi Alp
lease-time shows the remaining time in the lease, not the total time.
This is from the dhcp-eval man page:
lease-time
The duration of the current lease - that is, the differ-
ence between the current time and the time that the lease
expires.
regards,
-glenn
On Sat, October 3, 2015 6:51 am, Denis Laventure wrote:
> The client will renew the lease at half the max-lease-time. So seeing 150
> sec for a 300 sec lease seems normal.
>
> Hi,
>
> I have an easy question I believe, I want to log DHCP lease durations
> given to clients, I tried the following, however it appears most of the
> time, logs are showing half of the lease duration.
>
> log(info, concat( "IP: ", binary-to-ascii(10, 8, ".", leased-address), " ;
> ", "leasetime:", binary-to-ascii(10,32,"",encode-int(lease-time,32)) ));
>
> I have set the following lease time values for a pool:
>
> subnet 172.16.2.0 netmask 255.255.255.0 {
> option routers 172.16.2.1;
> pool {
> failover peer "failover-partner";
> default-lease-time 300;
> min-lease-time 300;
> max-lease-time 300;
> range
172.16https://www.dibbssm.net/GroupFiles/Group167/Documents/Cubs/E1_Cub_Fun_In_the_Snow.pdf.2.10
172.16.2.250;
> }
> }
>
> And this configuration produces an output like this:
>
> Oct 2 14:34:44 mercan dhcpd: IP: 172.16.2.127 ; leasetime:155
> Oct 2 14:37:10 mercan dhcpd: IP: 172.16.2.127 ; leasetime:154
> Oct 2 14:37:13 mercan dhcpd: IP: 172.16.2.127 ; leasetime:297
> Oct 2 14:39:37 mercan dhcpd: IP: 172.16.2.127 ; leasetime:156
> Oct 2 14:42:03 mercan dhcpd: IP: 172.16.2.127 ; leasetime:154
> Oct 2 14:44:28 mercan dhcpd: IP: 172.16.2.127 ; leasetime:155
> Oct 2 14:46:53 mercan dhcpd: IP: 172.16.2.127 ; leasetime:155
> Oct 2 14:49:18 mercan dhcpd: IP: 172.16.2.127 ; leasetime:155
> Oct 2 14:49:54 mercan dhcpd: IP: 172.16.2.127 ; leasetime:264
> Oct 2 14:50:47 mercan dhcpd: IP: 172.16.2.127 ; leasetime:247
> Oct 2 14:51:18 mercan dhcpd: IP: 172.16.2.127 ; leasetime:269
>
> How can log the precise lease durations, would be great if anyone has any
> suggestions?
>
> Thanks in advance.
> Alp
>
> _______________________________________________
> dhcp-users mailing list
> [email protected]
> https://lists.isc.org/mailman/listinfo/dhcp-users
------------------------------
Message: 2
Date: Mon, 5 Oct 2015 11:09:49 +0300
From: Alp Eren Kose <[email protected]>
To: Users of ISC DHCP <[email protected]>
Subject: Re: Logging DHCP lease duration in seconds
Message-ID:
<capjgewzvojqzsu8wtr0jim-jq_c-p8zzvlmz9vxxvry7sek...@mail.gmail.com>
Content-Type: text/plain; charset="utf-8"
Oh I see, that made it more clear, however I still didn't understand a
point. At renewal time, the client takes another full lease duration right,
so I would still expect to see the full duration?
Perhaps is there anyway that I can log the lease end time or duration at
each request? I know I can get this at the leases file, however I need to
log that.
Thanks a lot,
Alp
On Sun, Oct 4, 2015 at 3:47 PM, Glenn Satchell <[email protected]>
wrote:
> Hi Alp
>
> lease-time shows the remaining time in the lease, not the total time.
>
> This is from the dhcp-eval man page:
>
> lease-time
>
> The duration of the current lease - that is, the differ-
> ence between the current time and the time that the lease
> expires.
>
> regards,
> -glenn
>
> On Sat, October 3, 2015 6:51 am, Denis Laventure wrote:
> > The client will renew the lease at half the max-lease-time. So seeing 150
> > sec for a 300 sec lease seems normal.
> >
> > Hi,
> >
> > I have an easy question I believe, I want to log DHCP lease durations
> > given to clients, I tried the following, however it appears most of the
> > time, logs are showing half of the lease duration.
> >
> > log(info, concat( "IP: ", binary-to-ascii(10, 8, ".", leased-address), "
> ;
> > ", "leasetime:", binary-to-ascii(10,32,"",encode-int(lease-time,32)) ));
> >
> > I have set the following lease time values for a pool:
> >
> > subnet 172.16.2.0 netmask 255.255.255.0 {
> > option routers 172.16.2.1;
> > pool {
> > failover peer "failover-partner";
> > default-lease-time 300;
> > min-lease-time 300;
> > max-lease-time 300;
> > range
> 172.16
> https://www.dibbssm.net/GroupFiles/Group167/Documents/Cubs/E1_Cub_Fun_In_the_Snow.pdf.2.10
> 172.16.2.250;
> > }
> > }
> >
> > And this configuration produces an output like this:
> >
> > Oct 2 14:34:44 mercan dhcpd: IP: 172.16.2.127 ; leasetime:155
> > Oct 2 14:37:10 mercan dhcpd: IP: 172.16.2.127 ; leasetime:154
> > Oct 2 14:37:13 mercan dhcpd: IP: 172.16.2.127 ; leasetime:297
> > Oct 2 14:39:37 mercan dhcpd: IP: 172.16.2.127 ; leasetime:156
> > Oct 2 14:42:03 mercan dhcpd: IP: 172.16.2.127 ; leasetime:154
> > Oct 2 14:44:28 mercan dhcpd: IP: 172.16.2.127 ; leasetime:155
> > Oct 2 14:46:53 mercan dhcpd: IP: 172.16.2.127 ; leasetime:155
> > Oct 2 14:49:18 mercan dhcpd: IP: 172.16.2.127 ; leasetime:155
> > Oct 2 14:49:54 mercan dhcpd: IP: 172.16.2.127 ; leasetime:264
> > Oct 2 14:50:47 mercan dhcpd: IP: 172.16.2.127 ; leasetime:247
> > Oct 2 14:51:18 mercan dhcpd: IP: 172.16.2.127 ; leasetime:269
> >
> > How can log the precise lease durations, would be great if anyone has any
> > suggestions?
> >
> > Thanks in advance.
> > Alp
> >
> > _______________________________________________
> > dhcp-users mailing list
> > [email protected]
> > https://lists.isc.org/mailman/listinfo/dhcp-users
>
>
> _______________________________________________
> dhcp-users mailing list
> [email protected]
> https://lists.isc.org/mailman/listinfo/dhcp-users
>
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